Practise ‘wildlife gardening’

How is the evidence assessed?
  • Effectiveness
    not assessed
  • Certainty
    not assessed
  • Harms
    not assessed

Study locations

Key messages

  • Two studies evaluated the effects of practising wildlife gardening on butterflies and moths. One was in the UK and one was in the USA.

COMMUNITY RESPONSE (1 STUDY)

  • Richness/diversity (1 study): One replicated, paired, controlled study in the USA found that areas with reduced frequency weeding had a similar species richness of adult butterflies compared to areas with conventional weeding.

POPULATION RESPONSE (1 STUDY)

  • Abundance (1 study): One replicated, paired, controlled study in the USA found that areas with reduced frequency weeding had a similar abundance of all adult butterflies, and of adults, eggs and caterpillars of four target species, compared to areas with conventional weeding.

BEHAVIOUR (1 STUDY)

  • Use (1 study): One site comparison study in the UK found that planted buddleia and marjoram were visited by adult butterflies and moths more frequently than other plant species.

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A site comparison study in 2013 in a rural garden in East Sussex, UK (Shackleton & Ratnieks 2016) found that of 11 planted flower varieties, buddleia Buddleia davidii and marjoram Origanum vulgare were visited most by butterflies and day-flying moths, and they attracted different groups of species. Marjoram received the most visits by butterflies (50% of all visits), followed by buddleia (22% of all visits), compared to 0–12% visits for the other nine flower varieties. Meadow brown Maniola jurtina (213 out of 287 visits) and gatekeeper Pyronia tithonus (908/961 visits) were most attracted to marjoram, and peacock Inachis io (312/328 visits), painted lady Vanessa cardui (123/143 visits) and red admiral Vanessa atalanta (9/10 visits) were most attracted to buddleia. However, hemp agrimony Eupatorium cannibinum attracted the highest diversity of butterfly species (data presented as model results). See paper for more details. Eleven varieties of ornamental flowers were grown in 1–5 discrete patches (total: 1–15 m2) around a garden. From 8–13th August 2013, butterflies and day-flying moths feeding on each patch were counted 105 times (three times/hour at 20-minute intervals) in good weather.

    Study and other actions tested
  2. A replicated, paired, controlled study in 2013–2014 in a managed park in Georgia, USA (Majewska et al. 2018) found that areas with reduced weeding had a similar overall abundance and species richness of adult butterflies, and adults, eggs and caterpillars of four target species, compared to areas with regular weeding. The total abundance and species richness of butterflies was similar in plots weeded every two months and plots weeded every two weeks (data presented as model results). In addition, the abundance of adults, eggs and caterpillars of four target species (monarch Danaus plexippus, queen Danaus gilippus, gulf fritillary Agraulis vanillae, and black swallowtail Papilio polyxenes) were similar in plots with reduced weeding and plots with regular weeding (see paper for details). In spring 2013, four fenced, irrigated experimental plots (7.6 × 15.2 m, 20–88 m apart) were established in each of three blocks, 250 m apart. Each plot was planted with 128 plants of 13 species, and was surrounded by mown grass. Plots were assigned to four treatments/block: planting with native or non-native species, and low (every other month) or high (every other week) weed maintenance by hand pulling, trimming, and spot herbicide application. From May–September 2014, adult butterflies were surveyed for 7 minutes/plot, 1–4 times/month, and eggs and caterpillars of four species (monarch, queen, black swallowtail, gulf fritillary) were counted weekly or monthly on 2–14 host plants/butterfly species/plot.

    Study and other actions tested
Please cite as:

Bladon A.J., Smith R.K. & Sutherland W.J. (2022) Butterfly and Moth Conservation: Global Evidence for the Effects of Interventions for butterflies and moths. Conservation Evidence Series Synopsis. University of Cambridge, Cambridge, UK.

Where has this evidence come from?

List of journals searched by synopsis

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Butterfly and Moth Conservation

This Action forms part of the Action Synopsis:

Butterfly and Moth Conservation
Butterfly and Moth Conservation

Butterfly and Moth Conservation - Published 2022

Butterfly and Moth Synopsis

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